Commit e6b268dd authored by Joseph Gravenor's avatar Joseph Gravenor Committed by Alex Deucher
Browse files

drm/amd/display: Renoir chroma viewport WA change formula 



[why]
we want to increase the pte row plus 1 line if chroma viewport
height is integer multiple of the pte row height

[how]
instead of ceiling viewport height, we floor it. this allows
us to accommodate both cases: those where the chroma viewport
height is integer multiple of the pte row height and those where
it is not

Signed-off-by: default avatarJoseph Gravenor <joseph.gravenor@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8c8048f2

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c

+2 −2
Original line number Diff line number Diff line
@@ -204,8 +204,8 @@ void hubp21_set_viewport( 
			PTE_ROW_HEIGHT_LINEAR, &pte_row_height);



		pte_row_height = 1 << (pte_row_height + 3);

		pte_rows = (viewport_c->height + pte_row_height - 1) / pte_row_height;

		patched_viewport_height = pte_rows * pte_row_height + 3;

		pte_rows = (viewport_c->height / pte_row_height) + 1;

		patched_viewport_height = pte_rows * pte_row_height + 1;

	}